table linkage between SRM PO to SRM confirmation

Hi,

We are in SRM 7.02 EC. SRM SC-->SRM PO-->SRM confirmation-->replicate in to backend as GR

Is there any table linkage between SRM PO to SRM confirmation . I want to know confirmation number if I have PO number.

I have check table BBP_PDCON and SRRELROLES for SRM PO. No data available.

In SRM system If I know confirmation number, I can get PO number but not otherway round ?

Regards

Dayal